如何从richtextbox中计算c#中的字符数

Question

好了,所以基本上是我想在这里完成的计算都在RichTextBox中,并显示人物的哪些是元音,它会不断更新,并显示在工具条酒吧字符/元音数量.相当简单的代码,但在foreach循环和textchanged中似乎有一些错误.会很感激一些反馈请:)

private void Form1_Load(object sender, EventArgs e)
{
    int vowels;
    int characters;
    foreach(int char in rtbDoc)
    {
        characters+=1;
    }
    if (rtbDoc.Text == "a".ToLower() || rtbDoc.Text == "e".ToLower() 
        || rtbDoc.Text == "i".ToLower() || rtbDoc.Text == "o".ToLower()
        || rtbDoc.Text == "u".ToLower())
    {
        vowels += 1;
    }

    toolStripStatusLabel1.TextChanged = characters + 
                      "Characters, of which " + vowels + " are vowels";
}

Answer 1

这是Linq方法

char[] Vowels = new char[] { 'a', 'e', 'i', 'o', 'u' };
int CharacterCount = rtbDoc.Text.Length;
int VowelCount = rtbDoc.Text.Count(x => Vowels.Any(y => char.ToLower(x) == y));